Hello, my first post around here. I recently received my first LF camera, a Pacemaker Crown Graphic with the top rangefinder.

As the top rangefinder is not working (vertical alignment is way off, and the plunger is missing), Id like to remove it. Ive gotten as far as to remove most of the top housing, but there is one part left, a metal piece with the two mirrors mounted on it. How do I remove this?

http://southbristolviews.com/ ,graflex manuals link on left, pacemaker service manual.